sprite-kit - w3toppers.com

How do I detect if an SKSpriteNode has been touched

First set the name property of the SKSpriteNode to a string. pineapple.name = “pineapple” pineapple.userInteractionEnabled = false then in touchesBegan function in the Scene override func touchesBegan(touches: NSSet, withEvent event: UIEvent) { let touch:UITouch = touches.anyObject()! as UITouch let positionInScene = touch.locationInNode(self) let touchedNode = self.nodeAtPoint(positionInScene) if let name = touchedNode.name { if name == … Read more

What’s the best way to handle multiple SKScenes?

Having a Single View Controller and Multiple Scenes You could use single view controller (which is actually a default state of SpriteKit game template) and have multiple scenes. So you will have GameViewController and LandingScene, GameScene and possible some other scenes, like LevelSelect scene or something like that. In GameViewController, you initialize your scene for … Read more

how to throw SKSpriteNode?

Here is a quick example I wrote of moving a sprite with touch by simulating its velocity in the game-loop as opposed to setting the position directly. This makes the sprite more dynamic (i.e. you can “throw” it, and let it interact with other physics bodies as your drag the sprite). No angle calculations are … Read more

How to move enemy towards a moving player?

You have to update enemy position and zRotation property in each update: method call. Seeker and a Target Okay, so lets add some nodes to the scene. We need a seeker and a target. Seeker would be a missile, and target would be a touch location. I said you should do this inside of a … Read more

What are Sprite Kit’s “Category Mask” and “Collision Mask”?

The Category bit mask tells Sprite-Kit what sort of object this is. The Collision bit mask tells Sprite Kit what objects this object collides with (i.e. will hit and bounce off). The ContactTest bit mask tells Sprite-Kit what contacts you want to be notified about i.e. when this object touches another object. Collisions are handled … Read more

How to Detect collision in Swift, Sprite kit

Define unique categories, ensure your class is a SKPhysicsContactDelegate and make yourself the physics contact delegate: //Physics categories let enemyCategory: UInt32 = 1 << 1 let bulletCategory: UInt32 = 1 << 2 class GameScene: SKScene, SKPhysicsContactDelegate { physicsWorld.contactDelegate = self Assign the categories (usually in didMove(to view:) : enemy.physicsBody.catgeoryBitMask = enemyCategory bullet.physicsBody.catgeoryBitMask = bulletCategory (Make … Read more

Xcode 6 – xcassets for universal image support

This is a little confusing – here’s how I understand it (this is in reference to the top image): 1x images are for the original iPhone through the 3GS – ‘standard’ resolution devices (3.5″ screens) 2x images are for the iPhone 4 and 4S (3.5″ Retina screens) and are also used for the iPhone 6. … Read more

SKTextureAtlas Loading and Memory Management

Each TextureAtlas is 60K As a file maybe. But that’s not memory usage. To calculate memory usage of an image file, take the file’s dimensions and multiply them with color bit depth (usually 32 bits = 4 bytes). For example a 4096×4096 texture uses 16 MB of texture memory (but it may be much less … Read more

Dealing with different iOS device resolutions in SpriteKit

Adding the following code will fix your problem (code is in Swift): scene.scaleMode = SKSceneScaleMode.ResizeFill Now if you want to know why this fixes your problem, what your problem actually is, and how to handle multiple resolutions – I suggest you continue reading. There are three things that can impact the position of nodes in … Read more

Setting up buttons in SKScene

you could use a SKSpriteNode as your button, and then when the user touches, check if that was the node touched. Use the SKSpriteNode’s name property to identify the node: //fire button – (SKSpriteNode *)fireButtonNode { SKSpriteNode *fireNode = [SKSpriteNode spriteNodeWithImageNamed:@”fireButton.png”]; fireNode.position = CGPointMake(fireButtonX,fireButtonY); fireNode.name = @”fireButtonNode”;//how the node is identified later fireNode.zPosition = 1.0; … Read more